Low-Level Design (LLD) focuses on the internal workings of a system's components. While High-Level Design (HLD) provides a bird’s-eye view of the system’s architecture, LLD dives into the granular, class-level details required to actually build it.

Importance of LLD

• LLD provides class diagrams, method signatures and logic flow that developers can directly implement.
• Promotes Design Best Practices : Encourages use of SOLID principles, design patterns, and OOP techniques to write clean, scalable code
• Improves Code Maintainability : Modular and well-structured components make it easier to update, refactor or extend the system later
• Reduces Development Risks: Catching design issues early in LLD reduces the chances of major refactoring during or after development.
• Helps with Testing and Debugging : Clear separation of responsibilities makes unit testing and debugging more efficient.